I just installed a set of qtp electric cutouts on my car (on the flowtubes in front of the muffler) and all i can say is WOW. At wide open throttle the car FEELS like it's pulling harder, and i can't really notice any real loss in low end torque. Not to mention it sounds absolutely pi$$ed. I bought them more as a toy than a real performance upgrade, but any added top end power is certainly welcome. Now i just need some ricer to pull up next to me and throw some revs so I can crack them open and give him an earful.